diff --git a/QuizExperiment.Admin/Client/Shared/Edit/RootComponent.razor b/QuizExperiment.Admin/Client/Shared/Edit/RootComponent.razor
index 45b52f6..9bf3d23 100644
--- a/QuizExperiment.Admin/Client/Shared/Edit/RootComponent.razor
+++ b/QuizExperiment.Admin/Client/Shared/Edit/RootComponent.razor
@@ -48,6 +48,22 @@
                 </div>
             </div>
         </nav>
+        <!--Default Timeout bar -->
+        <nav class="navbar navbar-dark" style="background-color: #979696;">
+            <div class="container-fluid">
+                <div class="d-flex flex-row align-items-center" style="padding-left:93px;">
+                    <div class="pe-3">
+                        <span class="fs-5 text-light">Default Timeout (seconds)</span>
+                    </div>
+                    <div class="pe-3" style="width: 150px;">
+                        <input @bind="@_questionSet.DefaultTimeout" type="number" min="1" class="form-control" placeholder="e.g. 30" />
+                    </div>
+                    <div>
+                        <button class="btn btn-primary" @onclick="ApplyDefaultTimeoutToAllQuestions">Apply to All Questions</button>
+                    </div>
+                </div>
+            </div>
+        </nav>
 
         if (!AreAllQuestionsValid)
         {
@@ -304,4 +320,22 @@
         await Save();
         NavigationManager.NavigateTo($"/manage?path={_questionSet.FolderPath}");
     }
+
+    private void ApplyDefaultTimeoutToAllQuestions()
+    {
+        if (_questionSet?.DefaultTimeout > 0)
+        {
+            foreach (var question in _questions)
+            {
+                question.Timeout = _questionSet.DefaultTimeout.Value;
+            }
+            string message = $"Applied timeout of {_questionSet.DefaultTimeout.Value} seconds to all {_questions.Count} questions.";
+            toastService.ShowSuccess(message);
+        }
+        else
+        {
+            string message = "Please enter a valid timeout value (greater than 0).";
+            toastService.ShowError(message);
+        }
+    }
 }
diff --git a/QuizExperiment.Models.Test/JsonSerializationTests.cs b/QuizExperiment.Models.Test/JsonSerializationTests.cs
index 8be4650..b1bb088 100644
--- a/QuizExperiment.Models.Test/JsonSerializationTests.cs
+++ b/QuizExperiment.Models.Test/JsonSerializationTests.cs
@@ -5,6 +5,15 @@ namespace QuizExperiment.Models.Test
 {
     public class JsonSerializationTests
     {
+        private static JsonSerializerOptions GetJsonSerializerOptions()
+        {
+            var options = new JsonSerializerOptions();
+            options.Converters.Add(new PolymorphicQuestionConverter());
+            options.Converters.Add(new PolymorphicQuestionListConverter());
+            options.PropertyNamingPolicy = null;
+            return options;
+        }
+
         [Fact]
         public void DeserializeAndReserialize_V1Schema_PrintsOutput()
         {
@@ -18,10 +27,7 @@ public void DeserializeAndReserialize_V1Schema_PrintsOutput()
                 jsonPath = Path.GetFullPath(jsonPath);
             }
             var json = File.ReadAllText(jsonPath);
-            var options = new JsonSerializerOptions();
-            options.Converters.Add(new PolymorphicQuestionConverter());
-            options.Converters.Add(new PolymorphicQuestionListConverter());
-            options.PropertyNamingPolicy = null;
+            var options = GetJsonSerializerOptions();
 
             // Act
             var questionSet = JsonSerializer.Deserialize<QuestionSet>(json, options);
@@ -45,10 +51,7 @@ public void SerializingMultipleQuestionTypes()
         {
             // Arrange
             var baseDir = AppContext.BaseDirectory;
-            var options = new JsonSerializerOptions();
-            options.Converters.Add(new PolymorphicQuestionConverter());
-            options.Converters.Add(new PolymorphicQuestionListConverter());
-            options.PropertyNamingPolicy = null;
+            var options = GetJsonSerializerOptions();
 
             // Act
             var questionSet = new QuestionSet
@@ -85,5 +88,68 @@ public void SerializingMultipleQuestionTypes()
                     $"A question is missing the 'questionType' property: {question}");
             }
         }
+
+        [Fact]
+        public void DeserializeQuestionSetWithDefaultTimeout()
+        {
+            // Arrange
+            var options = GetJsonSerializerOptions();
+
+            // Act
+            var questionSet = new QuestionSet
+            {
+                Id = "test-id",
+                Title = "Test Quiz",
+                DefaultTimeout = 45,
+                Questions = new List<Question>
+                {
+                    new MultipleChoiceQuestion
+                    {
+                        Title = "Test Question",
+                        Options = new[] { "A", "B", "C", "D" },
+                        CorrectAnswerIndex = 0,
+                        Timeout = 30
+                    }
+                }
+            };
+            var json = JsonSerializer.Serialize(questionSet, options);
+            var deserializedQuestionSet = JsonSerializer.Deserialize<QuestionSet>(json, options);
+
+            // Assert
+            Assert.NotNull(deserializedQuestionSet);
+            Assert.Equal(45, deserializedQuestionSet.DefaultTimeout);
+            Assert.Equal("Test Quiz", deserializedQuestionSet.Title);
+        }
+
+        [Fact]
+        public void DeserializeQuestionSetWithoutDefaultTimeout()
+        {
+            // Arrange
+            var options = GetJsonSerializerOptions();
+
+            // Act
+            var questionSet = new QuestionSet
+            {
+                Id = "test-id",
+                Title = "Test Quiz",
+                Questions = new List<Question>
+                {
+                    new MultipleChoiceQuestion
+                    {
+                        Title = "Test Question",
+                        Options = new[] { "A", "B", "C", "D" },
+                        CorrectAnswerIndex = 0,
+                        Timeout = 30
+                    }
+                }
+            };
+            var json = JsonSerializer.Serialize(questionSet, options);
+            var deserializedQuestionSet = JsonSerializer.Deserialize<QuestionSet>(json, options);
+
+            // Assert
+            Assert.NotNull(deserializedQuestionSet);
+            Assert.Null(deserializedQuestionSet.DefaultTimeout);
+            Assert.Equal("Test Quiz", deserializedQuestionSet.Title);
+        }
     }
 }
\ No newline at end of file
diff --git a/QuizExperiment.Models.Test/TestData/v1SchemaQuestionSet.json b/QuizExperiment.Models.Test/TestData/v1SchemaQuestionSet.json
index 14de99f..797e6b1 100644
--- a/QuizExperiment.Models.Test/TestData/v1SchemaQuestionSet.json
+++ b/QuizExperiment.Models.Test/TestData/v1SchemaQuestionSet.json
@@ -29,5 +29,6 @@
       "correctAnswerIndex": 2
     }
   ],
-  "folderPath": null
+  "folderPath": null,
+  "defaultTimeout": 30
 }
\ No newline at end of file
diff --git a/QuizExperiment.Models.Test/TestData/v2SchemaQuestionSet.json b/QuizExperiment.Models.Test/TestData/v2SchemaQuestionSet.json
index 1a028bf..ba7bfd9 100644
--- a/QuizExperiment.Models.Test/TestData/v2SchemaQuestionSet.json
+++ b/QuizExperiment.Models.Test/TestData/v2SchemaQuestionSet.json
@@ -24,5 +24,6 @@
       "timeout": 15
     }
   ],
-  "folderPath": null
+  "folderPath": null,
+  "defaultTimeout": 25
 }
\ No newline at end of file
diff --git a/QuizExperiment.Models/QuestionSet.cs b/QuizExperiment.Models/QuestionSet.cs
index 9ac3546..51fc9dd 100644
--- a/QuizExperiment.Models/QuestionSet.cs
+++ b/QuizExperiment.Models/QuestionSet.cs
@@ -27,5 +27,8 @@ public class QuestionSet
 
         [JsonPropertyName("folderPath")]
         public string? FolderPath { get; set; }
+
+        [JsonPropertyName("defaultTimeout")]
+        public int? DefaultTimeout { get; set; }
     }
 }